the attack. the brutal killing of oneoftamerlantsarnaev'sbest friends unsolved since 2011 is now being reviewed with a, quote, wider group of eyes. we'll show you a controlled explosion of a pressure cooker bomb as experts work to learn all they can about these cheap and deadly devices. i'm wolf blitzer in boston and you're in "the situation room." here in boston investigators are learning more about the suspects in last week's bloody massacres. here are the latest developments. a government official tells cnn the surviving suspect told investigators the wars in afghanistan and iraq were motivating factors in the attacks. a new hampshire fireworks store confirms tamerlan tsarnaev bought two reloadable mortar kits with 48 shells but law enforcement officials say it wasn't enough for explosions of the size that occurred in boston. an 8-year-old bombing victim martin richard was buried today after a private funeral mass. his parents issued a statement saying, and i'll read it to you, we laid our son martin to rest and he is now at peace. just minutes ago the sisters of the bombing suspect

: eric shawn live in boston. eric, thank you. we are still trying to get to the real storyontamerlantsarnaev'strip to russia last year and his possible ties to terrorism and islamic extremism. chief intelligence correspondent catherine herridge is following that thread tonight. >> the fbi's handling of tamerlan tsarnaev in 2011 and six-month trip to russia the following year now face congressional scrutiny. >> was your department aware of his travels to russia and, if you weren't, the reason? >> yes. the system pinged when he was leaving the united states. by the time he returned all investigations had been -- the matter had been closed. >> napolitano said the lookout system that flags agents federal investigation no longer active when tamerlan returned from russia in july of 2012. >> the system picked up departure but did not pick him coming back, correct? >> the fbi text alert on him at that point was more than a year old and had expired. >> napolitano's pluck contradict briefing given by the fbi director. >> after talking to the fbi they told me they had no knowledge of him leav

was a islamist extremist and believe in theircause.tamerlantsarnaevtravel oversees in 6 months, in 2012, that was not on the fbi radar that he misspelled his name on the travel records to deliberately disguise his travel or there was a mistake from the russian airline and it was not flagged to the bureau. >> fbi, and cia and every intelligence agency is scrambling to figure out what is coming next. who were they associated with? are these guys lone wolves? it was cleared they were tied to international terrorist groups in chechnya. are they tied to al qaeda? we don't know yet. >> reporter: law enforcement tells fox news one of the ways they were able to identify the brothers as suspects in the investigation through surveillance video not publicly released where you see the two brothers reacting in completely different manner than the rest of the crowd when the blast goes off. they do not turn toward the blast with some foreknowledge much what would happen and they continue on their way, jon. jon: what about their overseas ties for the two brothers, what are we learning about that? >> re

was known about the older suspect who is nowdead,tamerlantsarnaev,and this trip ta hat he took to rusa last year. law makes want to know why is it that tamerlan tsarnaev was able to make this trip in the first place. should he have been stopped before he went overseas? when overseas what did he do? what was he up to when he was over there? some of this is stemming from some of the conflicting stories, quite frankly, chris, from federal officials over tamerlan tsarnaev's status. senator lindsey graham, republican from south carolina, told reporters yesterday that tamerlan was on a no-fly list, that he was on some sort of terror watch list a federal law enforcement official has told cnn that is not the case. and senator charles grassley, graham's republican colleague in the senate, asked secretary janet napolitano from the department of homeland security about the discrepancy earlier this morning. here's bit of that exchange. >> was your department aware of his travels to russia, and if you weren't, the reason? >> the travel in 2012 that you're referring to? yes, the system pinged when h

with the capture of 19-year-old dzhokhar tsarnaev. the olderbrothertamerlanwas killed thursday night in a gun battle with police. let's get the latest from don dahler in watertown. good morning, don. >> reporter: good morning, anthony. it was a week marked with inoh verdict victims and violence that marked one of the largest manhunts in this history culminating at a house you see through the trees back there. but as you said late last night the commissioner said the bostonians can finally breathe a sigh of relief. the first indication that the search might be over the round of applause that erupted at the scene. moments later the ambulance pulled away carrying a wounded dzhokhar tsarnaev with serious wounds to his leg and neck. >> we're exhausted folks but we have a victory here tonight. >> reporter: it was the culmination of a wild 27 hours when the fbi released photos of dzhokhar and tamerlan. at the time they were only known as suspect 1 and suspect 2. >> officer down. they're working it. they're working it. they're trying to get them there. >> reporter: by thursd

that it appears dzhokhar and his older brothertamerlanwasby i ideology. chilling new details in a ten-page fbi affidavit. a few minutes after the surveillance video captured the brothers at the marathon they split up according to court documents. tarrer lan heads to the finish line as his younger brother blends in with the crowd. dzhokhar places his backpack on the ground. at 2:50 the first bomb explodes. according to the affidavit, virtually every head turns, stares in that direction in apparent bewilderment and alarm, dzhokhar appears calm walk as way without his backpack seconds later, it detonates in the exact spot where he was landing. during thursday's getaway, one of the brothers bragged, did you hear about the boston explosion? i did that. and dzhokhar's roomdartmouth, key evidence. a black jacket andhat. matching the clothing he was wearing at the scene. law enforcement sources say there are clear signs that tamerlan, the older brother, had become increasingly radicalized, motivated by jihadi websites. they picked the boston marathon and boylston street bec

their device with the help of al qaeda,andtamerlantsarnaevcalled most of the shots, and lawmakers on capitol hill are demanding more answers. top fbi officials meeting in a closed door hearing. we don't know how much the feds will reveal at this statement of the investigation but that u.s. officials confirm that working theory, as he puts it, the two suspects acted fully alone. their radical islamic faith motivating them, and they toshed that online al qaeda magazine for bomb-making instructions as anybody on planet earth can if he or she wishes to do so. analysts call the guide for terrorist activity, with articles clerk make a bomb in the kitchen of your mom. u.s. reports the drone create you're in the same strike. the widow of tamerlan tsarnaev has stayed out of the public eye but today her attorney says he is cooperating. >> the reports of involvement by her husband and brother-in-law came as an absolute shock to them all. as a mother, a sister, a daughter, a wife, katy deeply mourns the pain and loss to innocent victims. >> shepard: we're learning more about her husband's tri

the road where the two boston marathonsuspects,tamerlananddzhokhar tsarnaev were engaging in this gunfight with police. we'll scroll through a couple of these pictures. keep your eyes here on the screen. the photos here show the brothers huddling behind a stolen suv at times as we reported through the hours last week, shooting at police, before this older brother tamerlan charges, runs towards these officers here, then he's seen lying in the street. the suv driven by his younger brother who we know is in fair condition at this hour at a hospital here in boston, he's in the car, accelerates toward his older brother, on the ground. >> what is the context for that? do they believe he was trying to escape, do they believe he was trying to maybe separate his brother from the officers or is there anything on this? >> i think his brother was on the ground, his brother was enga engaging, strapped with explosives and the younger brother from everything i've gleaned wants to get out of there. >> maybe because of the explosives. what does he wind up doing? >> ultimately gets out of t

now know the fbi interviewed the oldersuspect,tamerlantsarnaev,two years ago after being tipped off he was a follower of radicalism. coming up at 7:15, why some lawmakers want to know if the fbi dropped the ball. >>> time is running out in san jose for people living in a large homeless camp. they will be forced to leave in a couple of hours. ktvu's janine de la vega is live near the camp where those cleanup crews are getting ready to sweep through the area. >> reporter: we've been here since 4:30. now that it's lighter, we can get a better idea what this looks like. the homeless have been access through the chain-link fence. there's a lot of trash, manmade structures and tarps. we've seen people packing up and getting ready to move. city officials estimate a lot of single adults, couples and their pets have set up camp. crews were here lost october and removed 50 tons of trash. some people are driving their cars down access roads and leaving them there to reach their -- dash camp. the project manager says they plan to close off roads and hire private security to prevent the hom

roots in the chechnya region of russia. olderbrothertamerlanvisiteddagestan in 2012 a region in southern russia where his father and mother still live. in an interview with "the wall street journal" their mother said tamerlan had given your boxing and drinking and smoking as he turned to a religious life and told the paper he phoned her the night he died saying, quote, the police, they have started shooting at us. they are chasing us. telling her he loved her before the phone went silent. and his uncle who lives in maryland says he believes the older brother became radicalized in cambridge and not overseas and eventually drew in his younger brother but lawmakers say more questions about their past need to be answered. >> we believe they may have traveled on an alias to get back to his home country and that seven months, six and a half months or so becomes extremely important. so you know he had some radicalization before he left, you know he probably didn't travel on his own name or some variation of his own name, and when he comes back, he has a renewed interest in that radi

that ended with a surprisingly subdued ending on friday night.26-year-oldtamerlantsarnaevwas pronounced dead after a dramatic shootout with law enforcement early friday morning. his 19-year-old dzhokhar escaped on foot precipitating a shelter in place order for the entire boston area. but the much sought after armed and dangerous teen was found wounded and incoherent in a boat parked in the backyard of a suburban watertown home. discovered not by the hundreds of armed officers who had been searching for him for hours but by the home's owner, reportedly out for a smoke. with one assailant dead and the other in police custody, the people of watertown and the entire boston area expressed their enormous gratitude and sense of relief with spontaneous cheers and applause on friday night. the crisis is over. now the politics begin and this is where our responsibility in the media shifts. in the heat of the crisis, media take on the job of informational clearinghouse, keeping the public up to date, sharing critical information and get the information out right and fast. granted, those are goals

authorities or the u.s. governmentabouttamerlansangthere was a possibility he was being radicalized. the fbi interviewed him and his family concluded there was nothing there and closed the case. he then made six month trip to russia in 2012 but his exact whereabouts and activities are unclear. after that trip, he posted radical islamic videos on his view to. as you can see on this video. could the fbi have done more to prevent what happened at the boston marathon way back in 2010-- 2011 and 12. >> we're taking a live look at the funeral of one of the three was killed in the boston marathon attack. crystal campbell was a 29 year-old restaurant worker. later tonight, a memorial service will be held at boston university for 22 year-old grad student lu lingzi, another victim. >> she was also killed in the bombing. light coming to us from boston. >> more on first baseman brandon moss and right fielder joshed rediuck hope to meet with 11 year-old a aron hern, the martinez will injured in the boston marathon bombings at boston's children's hospital. the a's fall to boston last night was st

to the one in the surveillance photos he was allegedly wearing. investigators also want toquestiontamerlantsarnaev'swife. the couple initially met at a nightclub. she later converted to islam, dropped out of college and had a child with him. her attorney has said that she had no suspicions that her husband might be plotting an attack. hundreds of people stood in silence at copley square at 2:50 p.m. one week after the bombings. president obama marked the moment of silence from the white house. the u.s. senate held a similar tribute on capitol hill. >>> it is still unclear what impact the boston bombings will have on the immigration debate in congress but the topic of national security is clearly playing a more rom neprominent n the discussion. things got tense on capitol hill yesterday when senator chuck schumer sparred with republican senator chuck grassley about the future of the legislation. take a look. >> a few ways to improve the bill, offer an amendment when we start mark-up in may and let's vote on it. i say that particularly to those who are pointing to what happened, the terrib